In situ electrochemical and spectrophotometric investigation of the oxygen pressure dependence of the [Cr(VI)]/[Cr(III)] ratio in a borosilicate melt

Claes, Paul;Duveiller, P;Tilquin, JY.;Glibert, Jacques
(1996) Discussion Meeting of the Deutsche-Bunsen-Gesellschaft-fur-Physikalische-Chemie - Physical Chemistry of Glasses — Location: JENA(Germany) (18.March.1996)

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  • Claes, PaulUCLouvain
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  • Duveiller, P
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  • Tilquin, JY.
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  • Glibert, JacquesUCLouvain
    Author
Abstract
The ratio R = [Cr(VI)]/[Cr(III)] has been measured in a Na2O . 1.2SiO(2) . 1.2B(2)O(3) melt at 1000 degrees C by spectrophotometry and by electrochemistry as a function of the partial pressure of oxygen in the gaseous atmosphere above the melt. Spectrochemical and electrochemical determinations are in quite good agreement and fit the linear relationship between log R and log P(O-2) which is predicted by a thermodynamic development. This double agreement gives a good degree of confidence to in situ high temperature electrochemical measurements in oxide melts.
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Claes, P., Duveiller, P., Tilquin, JY., & Glibert, J. (1996). In situ electrochemical and spectrophotometric investigation of the oxygen pressure dependence of the [Cr(VI)]/[Cr(III)] ratio in a borosilicate melt. Deutsche Bunsen-Gesellschaft fuer Physikalische Chemie. Berichte, 100(9), 1479-1483. https://hdl.handle.net/2078.5/144139 (Original work published 1996)